This is exactly the method how criminals in my home country send scam texts to victims[1], it's hard to trace since they are mobile. Before LTE towers were wide

This is exactly the method how criminals in my home country send scam texts to victims[1], it's hard to trace since they are mobile. Before LTE towers were widely deployed, two major GSM operators can't prevent people from connecting to a malicious station, since 2G sim cards do not have capabilities to authenticate operator's network. It's a relief that major operators today are actively rolling out 4G SIM cards, and law enforcements are taking malicious stations seriously. So today if you set up rogue GSM BTS, you might be prosecuted. [1] http://www.theregister.co.uk/2014/03/26/spam_text_china_clampdown_police/ http://www.theregister.co.uk/2014/03/26/spam_text_china_clam...